Question

If a²+b²=c²,then show that
(a+b+c)²=2(ab+bc+ca)​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

a2 + b2 + (-c)2 + 2ab + 2 (b) (-c) + 2 (-c) (a)

= a2 + b2 + c2 + 2ab – 2bc - 2ca

Therefore, (a + b - c)2 = a2 + b2 + c2 + 2ab – 2bc - 2ca and your answer will be 2( ab + bc + ca )

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